William mullally



W. MULLALLY.

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' PatentedOct; 29, 1867.

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WILLIAM MULLALLY, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HOWARD TILDEN, OF SAME PLACE.

Letters Patent 1V0. 70,247, dated October 29, 1867.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, WILLIAM MULLALLY, of Boston, Suffolk county, State of Massachusetts, have invented certain new and useful Improvements in Lamps; and I do hereby declare the following description and accompanying drawings are suilicient to enable any person skilled in the art or science to which it most nearly appertains to make and use my said invention or improvements without further invention or experiment.

The nature of my invention and improvements consists in arranging the bottom of the perpendicular part of the blaze-cap soas to leave an open space between it and the base which supports it for the air to pass up between the chimney and the blaze-cap, and at the same time prevent the cap from heating the base so much as it might otherwise do; and in a deflector at each end of the blaze-slot, extending down to the wick-tube, to turn the air from the ends of the slot and compel it to pass up at the sides of the blaze, and permitthe blaze to spread or widen out at the side edges above the cap; and in making some projections or lugs on the base-plate to fit recesses in the sides of the cap, so that the cap can be readily removed from the base-plate to adjust the wick or clearout the base of the top; also in arranging some pins or lugs on the edge of the bottom or baseplate for the lower end of the chimney to stand on; and in combination with the above-named improvements, or some of them, a perforated bottom plate to connect them to the lamp. In the accompanying drawings.

Figure 1 is a'plan of the top, and i Figure 2 a side elevation, and

Figure 3 a plan of the bottom.

In these drawings, A is the bottom plate of the base, made of perforated sheet metal, which may be swaged into the required shape, and a screw, 13, cut on it to screw into the top of the lamp or oil-vessel. In the centre of the plate A the wick-tube G is fastened, and provided with a finger-disk, E, shaft D, and notched disk F, to raise and lower the wick as required. I make a convex plate, G, with an opening in the middle, and connect it to the top of the bottom plateA by fastening their outer edges together. I make three or more lugs or projections to extend up from the inner edge of the plate G, as shown at I, fig. 2, by dotted lines, and swagc or bend out some places in the lower edge of the cap H to form recesses for the lugs I to fit in, and hold the cap H in proper position on the plate G, and permit it to be readily removed to adjust the wick, and clear out the base of the top,

' and replaced again. There are some shoulders on the lugs I to stop the cap H and hold its lower edge a little above the top of the plate G, and leave an open space between them for the air to pass out from below the plate G, and up around the sides of the cap H, inside of the chimney, to supply the blaze above the cap as it issues from the slot N in the cap. The blaze-cap H may be made in the form shown, or in such other form as will answer the purpose, with an opening or slot N in the apex or top for the blaze from the wick in the tubc O to pass out. I arrange a deflector, J, at each end of the slot N. It consists of a piece of sheet metal, about the width of the slot, extending from the end of the slot down to the edges of the wick-tube, as shown in dotted lines at J J, fig. 2. These deflectors may be made and fastened to the cap, or the piece cut informing the slot may be cut across the centre, and each end or part bent or pressed into position to form the deflectors. These deflectors turn the current of air from the ends of the slot and compel it to pass up at the sides of the blaze, and permit the blaze to spread or widen outat the edges above the cap, and produce far morc' etfectual and available light from a given quantity of oil. I fasten three or more wires L L to the peripheries of the plates A and G for the lower end of the chimney to'stand on, which is held upright by thewires K K fastened in the plate G. Or the wires may be bent in the form shown by dotted lines at K, fig. 2, and pass twice through the plate G, so that the chimney will stand on the lower end, where it projects out beyond the periphery of the plate, while the upper ends of the wires prevent the chimney from tipping, and hold it upright. I contemplate that the mode of connecting the cap H to the plate G may be modified in various ways, and that some projections may beswaged out on the lower edge of the cap and perforated to receive the lugs on the plate, one of which lugs may be made twice as wide as the others, so that the cap can only be put onto correspond with the wick-tube. Also, that the plate G may be made of glass or porcelain, with lugsto fit recesses in the cap, or perforated to receive lugs or pins on the lower edge of the cap. I contemplate that the plate G may be made flat, and the bottom plate A Concave, if preferred that way.

I do not claim a. cone or blaze-cap with perforated sides, such as have been used heretofore; but what I claim as my invention and improvements in lamps is Arranging the bottom of the cap Halittle above the convex base G, leaving an opening between it and the base G for the air to pass out and up, and cool the chimney, and to prevent the cap from heating the base.

I also claim the deflectors J J extending down from the ends of the slot in a blaze-cap with closed sides, substantially as described. J

I claim making lugs or supports on the base-plate to fit reeesses in the side of the cap, so that the cap can be readily removed from the base-plate to adjust the wick and clean out the base of the top.

I claim the pins or lugs on the base or bottom plate for the lower edge of the chimney to stand on, substantially as described.

And in combination with the cap and base arranged substantially as described, I claim the perforated bottom plate A. for connecting the top to the lamp or oil-vessel. WILLIAM MULLALLY.

Witnesses:

C. C. GILBERT, Jos. B. BELL, 

